[net-next-2.6.git] / include / linux / ipv6.h

#ifndef _IPV6_H
#define _IPV6_H

#include <linux/in6.h>
#include <asm/byteorder.h>

/* The latest drafts declared increase in minimal mtu up to 1280. */

#define IPV6_MIN_MTU	1280

/*
 *	Advanced API
 *	source interface/address selection, source routing, etc...
 *	*under construction*
 */


struct in6_pktinfo {
	struct in6_addr	ipi6_addr;
	int		ipi6_ifindex;
};


struct in6_ifreq {
	struct in6_addr	ifr6_addr;
	__u32		ifr6_prefixlen;
	int		ifr6_ifindex; 
};

#define IPV6_SRCRT_STRICT	0x01	/* this hop must be a neighbor	*/
#define IPV6_SRCRT_TYPE_0	0	/* IPv6 type 0 Routing Header	*/
#define IPV6_SRCRT_TYPE_2	2	/* IPv6 type 2 Routing Header	*/

/*
 *	routing header
 */
struct ipv6_rt_hdr {
	__u8		nexthdr;
	__u8		hdrlen;
	__u8		type;
	__u8		segments_left;

	/*
	 *	type specific data
	 *	variable length field
	 */
};


struct ipv6_opt_hdr {
	__u8 		nexthdr;
	__u8 		hdrlen;
	/* 
	 * TLV encoded option data follows.
	 */
};

#define ipv6_destopt_hdr ipv6_opt_hdr
#define ipv6_hopopt_hdr  ipv6_opt_hdr

#ifdef __KERNEL__
#define ipv6_optlen(p)  (((p)->hdrlen+1) << 3)
#endif

/*
 *	routing header type 0 (used in cmsghdr struct)
 */

struct rt0_hdr {
	struct ipv6_rt_hdr	rt_hdr;
	__u32			reserved;
	struct in6_addr		addr[0];

#define rt0_type		rt_hdr.type
};

/*
 *	routing header type 2
 */

struct rt2_hdr {
	struct ipv6_rt_hdr	rt_hdr;
	__u32			reserved;
	struct in6_addr		addr;

#define rt2_type		rt_hdr.type
};

/*
 *	home address option in destination options header
 */

struct ipv6_destopt_hao {
	__u8			type;
	__u8			length;
	struct in6_addr		addr;
} __attribute__ ((__packed__));

struct ipv6_auth_hdr {
	__u8  nexthdr;
	__u8  hdrlen;           /* This one is measured in 32 bit units! */
	__be16 reserved;
	__be32 spi;
	__be32 seq_no;           /* Sequence number */
	__u8  auth_data[0];     /* Length variable but >=4. Mind the 64 bit alignment! */
};

struct ipv6_esp_hdr {
	__be32 spi;
	__be32 seq_no;           /* Sequence number */
	__u8  enc_data[0];      /* Length variable but >=8. Mind the 64 bit alignment! */
};

struct ipv6_comp_hdr {
	__u8 nexthdr;
	__u8 flags;
	__be16 cpi;
};

/*
 *	IPv6 fixed header
 *
 *	BEWARE, it is incorrect. The first 4 bits of flow_lbl
 *	are glued to priority now, forming "class".
 */

struct ipv6hdr {
#if defined(__LITTLE_ENDIAN_BITFIELD)
	__u8			priority:4,
				version:4;
#elif defined(__BIG_ENDIAN_BITFIELD)
	__u8			version:4,
				priority:4;
#else
#error	"Please fix <asm/byteorder.h>"
#endif
	__u8			flow_lbl[3];

	__be16			payload_len;
	__u8			nexthdr;
	__u8			hop_limit;

	struct	in6_addr	saddr;
	struct	in6_addr	daddr;
};

/*
 * This structure contains configuration options per IPv6 link.
 */
struct ipv6_devconf {
	__s32		forwarding;
	__s32		hop_limit;
	__s32		mtu6;
	__s32		accept_ra;
	__s32		accept_redirects;
	__s32		autoconf;
	__s32		dad_transmits;
	__s32		rtr_solicits;
	__s32		rtr_solicit_interval;
	__s32		rtr_solicit_delay;
	__s32		force_mld_version;
#ifdef CONFIG_IPV6_PRIVACY
	__s32		use_tempaddr;
	__s32		temp_valid_lft;
	__s32		temp_prefered_lft;
	__s32		regen_max_retry;
	__s32		max_desync_factor;
#endif
	__s32		max_addresses;
	__s32		accept_ra_defrtr;
	__s32		accept_ra_pinfo;
#ifdef CONFIG_IPV6_ROUTER_PREF
	__s32		accept_ra_rtr_pref;
	__s32		rtr_probe_interval;
#ifdef CONFIG_IPV6_ROUTE_INFO
	__s32		accept_ra_rt_info_max_plen;
#endif
#endif
	__s32		proxy_ndp;
	void		*sysctl;
};

/* index values for the variables in ipv6_devconf */
enum {
	DEVCONF_FORWARDING = 0,
	DEVCONF_HOPLIMIT,
	DEVCONF_MTU6,
	DEVCONF_ACCEPT_RA,
	DEVCONF_ACCEPT_REDIRECTS,
	DEVCONF_AUTOCONF,
	DEVCONF_DAD_TRANSMITS,
	DEVCONF_RTR_SOLICITS,
	DEVCONF_RTR_SOLICIT_INTERVAL,
	DEVCONF_RTR_SOLICIT_DELAY,
	DEVCONF_USE_TEMPADDR,
	DEVCONF_TEMP_VALID_LFT,
	DEVCONF_TEMP_PREFERED_LFT,
	DEVCONF_REGEN_MAX_RETRY,
	DEVCONF_MAX_DESYNC_FACTOR,
	DEVCONF_MAX_ADDRESSES,
	DEVCONF_FORCE_MLD_VERSION,
	DEVCONF_ACCEPT_RA_DEFRTR,
	DEVCONF_ACCEPT_RA_PINFO,
	DEVCONF_ACCEPT_RA_RTR_PREF,
	DEVCONF_RTR_PROBE_INTERVAL,
	DEVCONF_ACCEPT_RA_RT_INFO_MAX_PLEN,
	DEVCONF_PROXY_NDP,
	DEVCONF_MAX
};

#ifdef __KERNEL__
#include <linux/icmpv6.h>
#include <linux/tcp.h>
#include <linux/udp.h>

#include <net/if_inet6.h>       /* struct ipv6_mc_socklist */
#include <net/inet_sock.h>

/* 
   This structure contains results of exthdrs parsing
   as offsets from skb->nh.
 */

struct inet6_skb_parm {
	int			iif;
	__u16			ra;
	__u16			hop;
	__u16			dst0;
	__u16			srcrt;
	__u16			dst1;
	__u16			lastopt;
	__u32			nhoff;
	__u16			flags;
#ifdef CONFIG_IPV6_MIP6
	__u16			dsthao;
#endif

#define IP6SKB_XFRM_TRANSFORMED	1
};

#define IP6CB(skb)	((struct inet6_skb_parm*)((skb)->cb))

static inline int inet6_iif(const struct sk_buff *skb)
{
	return IP6CB(skb)->iif;
}

struct inet6_request_sock {
	struct in6_addr		loc_addr;
	struct in6_addr		rmt_addr;
	struct sk_buff		*pktopts;
	int			iif;
};

struct tcp6_request_sock {
	struct tcp_request_sock	  tcp6rsk_tcp;
	struct inet6_request_sock tcp6rsk_inet6;
};

/**
 * struct ipv6_pinfo - ipv6 private area
 *
 * In the struct sock hierarchy (tcp6_sock, upd6_sock, etc)
 * this _must_ be the last member, so that inet6_sk_generic
 * is able to calculate its offset from the base struct sock
 * by using the struct proto->slab_obj_size member. -acme
 */
struct ipv6_pinfo {
	struct in6_addr 	saddr;
	struct in6_addr 	rcv_saddr;
	struct in6_addr		daddr;
	struct in6_addr		*daddr_cache;
#ifdef CONFIG_IPV6_SUBTREES
	struct in6_addr		*saddr_cache;
#endif

	__u32			flow_label;
	__u32			frag_size;
	__s16			hop_limit;
	__s16			mcast_hops;
	int			mcast_oif;

	/* pktoption flags */
	union {
		struct {
			__u16	srcrt:2,
				osrcrt:2,
			        rxinfo:1,
			        rxoinfo:1,
				rxhlim:1,
				rxohlim:1,
				hopopts:1,
				ohopopts:1,
				dstopts:1,
				odstopts:1,
                                rxflow:1,
				rxtclass:1;
		} bits;
		__u16		all;
	} rxopt;

	/* sockopt flags */
	__u8			mc_loop:1,
	                        recverr:1,
	                        sndflow:1,
				pmtudisc:2,
				ipv6only:1;
	__u8			tclass;

	__u32			dst_cookie;

	struct ipv6_mc_socklist	*ipv6_mc_list;
	struct ipv6_ac_socklist	*ipv6_ac_list;
	struct ipv6_fl_socklist *ipv6_fl_list;

	struct ipv6_txoptions	*opt;
	struct sk_buff		*pktoptions;
	struct {
		struct ipv6_txoptions *opt;
		struct rt6_info	*rt;
		int hop_limit;
		int tclass;
	} cork;
};

/* WARNING: don't change the layout of the members in {raw,udp,tcp}6_sock! */
struct raw6_sock {
	/* inet_sock has to be the first member of raw6_sock */
	struct inet_sock	inet;
	__u32			checksum;	/* perform checksum */
	__u32			offset;		/* checksum offset  */
	struct icmp6_filter	filter;
	/* ipv6_pinfo has to be the last member of raw6_sock, see inet6_sk_generic */
	struct ipv6_pinfo	inet6;
};

struct udp6_sock {
	struct udp_sock	  udp;
	/* ipv6_pinfo has to be the last member of udp6_sock, see inet6_sk_generic */
	struct ipv6_pinfo inet6;
};

struct tcp6_sock {
	struct tcp_sock	  tcp;
	/* ipv6_pinfo has to be the last member of tcp6_sock, see inet6_sk_generic */
	struct ipv6_pinfo inet6;
};

extern int inet6_sk_rebuild_header(struct sock *sk);

#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
static inline struct ipv6_pinfo * inet6_sk(const struct sock *__sk)
{
	return inet_sk(__sk)->pinet6;
}

static inline struct inet6_request_sock *
			inet6_rsk(const struct request_sock *rsk)
{
	return (struct inet6_request_sock *)(((u8 *)rsk) +
					     inet_rsk(rsk)->inet6_rsk_offset);
}

static inline u32 inet6_rsk_offset(struct request_sock *rsk)
{
	return rsk->rsk_ops->obj_size - sizeof(struct inet6_request_sock);
}

static inline struct request_sock *inet6_reqsk_alloc(struct request_sock_ops *ops)
{
	struct request_sock *req = reqsk_alloc(ops);

	if (req != NULL)
		inet_rsk(req)->inet6_rsk_offset = inet6_rsk_offset(req);

	return req;
}

static inline struct raw6_sock *raw6_sk(const struct sock *sk)
{
	return (struct raw6_sock *)sk;
}

static inline void inet_sk_copy_descendant(struct sock *sk_to,
					   const struct sock *sk_from)
{
	int ancestor_size = sizeof(struct inet_sock);

	if (sk_from->sk_family == PF_INET6)
		ancestor_size += sizeof(struct ipv6_pinfo);

	__inet_sk_copy_descendant(sk_to, sk_from, ancestor_size);
}

#define __ipv6_only_sock(sk)	(inet6_sk(sk)->ipv6only)
#define ipv6_only_sock(sk)	((sk)->sk_family == PF_INET6 && __ipv6_only_sock(sk))

struct inet6_timewait_sock {
	struct in6_addr tw_v6_daddr;
	struct in6_addr	tw_v6_rcv_saddr;
};

struct tcp6_timewait_sock {
	struct tcp_timewait_sock   tcp6tw_tcp;
	struct inet6_timewait_sock tcp6tw_inet6;
};

static inline u16 inet6_tw_offset(const struct proto *prot)
{
	return prot->twsk_prot->twsk_obj_size -
			sizeof(struct inet6_timewait_sock);
}

static inline struct inet6_timewait_sock *inet6_twsk(const struct sock *sk)
{
	return (struct inet6_timewait_sock *)(((u8 *)sk) +
					      inet_twsk(sk)->tw_ipv6_offset);
}

static inline struct in6_addr *__inet6_rcv_saddr(const struct sock *sk)
{
	return likely(sk->sk_state != TCP_TIME_WAIT) ?
		&inet6_sk(sk)->rcv_saddr : &inet6_twsk(sk)->tw_v6_rcv_saddr;
}

static inline struct in6_addr *inet6_rcv_saddr(const struct sock *sk)
{
	return sk->sk_family == AF_INET6 ? __inet6_rcv_saddr(sk) : NULL;
}

static inline int inet_v6_ipv6only(const struct sock *sk)
{
	return likely(sk->sk_state != TCP_TIME_WAIT) ?
		ipv6_only_sock(sk) : inet_twsk(sk)->tw_ipv6only;
}
#else
#define __ipv6_only_sock(sk)	0
#define ipv6_only_sock(sk)	0

static inline struct ipv6_pinfo * inet6_sk(const struct sock *__sk)
{
	return NULL;
}

static inline struct inet6_request_sock *
			inet6_rsk(const struct request_sock *rsk)
{
	return NULL;
}

static inline struct raw6_sock *raw6_sk(const struct sock *sk)
{
	return NULL;
}

#define __inet6_rcv_saddr(__sk)	NULL
#define inet6_rcv_saddr(__sk)	NULL
#define tcp_twsk_ipv6only(__sk)		0
#define inet_v6_ipv6only(__sk)		0
#endif /* defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) */

#define INET6_MATCH(__sk, __hash, __saddr, __daddr, __ports, __dif)\
	(((__sk)->sk_hash == (__hash))				&& \
	 ((*((__portpair *)&(inet_sk(__sk)->dport))) == (__ports))  	&& \
	 ((__sk)->sk_family		== AF_INET6)		&& \
	 ipv6_addr_equal(&inet6_sk(__sk)->daddr, (__saddr))	&& \
	 ipv6_addr_equal(&inet6_sk(__sk)->rcv_saddr, (__daddr))	&& \
	 (!((__sk)->sk_bound_dev_if) || ((__sk)->sk_bound_dev_if == (__dif))))

#endif /* __KERNEL__ */

#endif /* _IPV6_H */
Commit	Line	Data
	1	#ifndef _IPV6_H
	2	#define _IPV6_H
	3
	4	#include <linux/in6.h>
	5	#include <asm/byteorder.h>
	6
	7	/* The latest drafts declared increase in minimal mtu up to 1280. */
	8
	9	#define IPV6_MIN_MTU 1280
	10
	11	/*
	12	* Advanced API
	13	* source interface/address selection, source routing, etc...
	14	* under construction
	15	*/
	16
	17
	18	struct in6_pktinfo {
	19	struct in6_addr ipi6_addr;
	20	int ipi6_ifindex;
	21	};
	22
	23
	24	struct in6_ifreq {
	25	struct in6_addr ifr6_addr;
	26	__u32 ifr6_prefixlen;
	27	int ifr6_ifindex;
	28	};
	29
	30	#define IPV6_SRCRT_STRICT 0x01 /* this hop must be a neighbor */
	31	#define IPV6_SRCRT_TYPE_0 0 /* IPv6 type 0 Routing Header */
	32	#define IPV6_SRCRT_TYPE_2 2 /* IPv6 type 2 Routing Header */
	33
	34	/*
	35	* routing header
	36	*/
	37	struct ipv6_rt_hdr {
	38	__u8 nexthdr;
	39	__u8 hdrlen;
	40	__u8 type;
	41	__u8 segments_left;
	42
	43	/*
	44	* type specific data
	45	* variable length field
	46	*/
	47	};
	48
	49
	50	struct ipv6_opt_hdr {
	51	__u8 nexthdr;
	52	__u8 hdrlen;
	53	/*
	54	* TLV encoded option data follows.
	55	*/
	56	};
	57
	58	#define ipv6_destopt_hdr ipv6_opt_hdr
	59	#define ipv6_hopopt_hdr ipv6_opt_hdr
	60
	61	#ifdef __KERNEL__
	62	#define ipv6_optlen(p) (((p)->hdrlen+1) << 3)
	63	#endif
	64
	65	/*
	66	* routing header type 0 (used in cmsghdr struct)
	67	*/
	68
	69	struct rt0_hdr {
	70	struct ipv6_rt_hdr rt_hdr;
	71	__u32 reserved;
	72	struct in6_addr addr[0];
	73
	74	#define rt0_type rt_hdr.type
	75	};
	76
	77	/*
	78	* routing header type 2
	79	*/
	80
	81	struct rt2_hdr {
	82	struct ipv6_rt_hdr rt_hdr;
	83	__u32 reserved;
	84	struct in6_addr addr;
	85
	86	#define rt2_type rt_hdr.type
	87	};
	88
	89	/*
	90	* home address option in destination options header
	91	*/
	92
	93	struct ipv6_destopt_hao {
	94	__u8 type;
	95	__u8 length;
	96	struct in6_addr addr;
	97	} __attribute__ ((__packed__));
	98
	99	struct ipv6_auth_hdr {
	100	__u8 nexthdr;
	101	__u8 hdrlen; /* This one is measured in 32 bit units! */
	102	__be16 reserved;
	103	__be32 spi;
	104	__be32 seq_no; /* Sequence number */
	105	__u8 auth_data[0]; /* Length variable but >=4. Mind the 64 bit alignment! */
	106	};
	107
	108	struct ipv6_esp_hdr {
	109	__be32 spi;
	110	__be32 seq_no; /* Sequence number */
	111	__u8 enc_data[0]; /* Length variable but >=8. Mind the 64 bit alignment! */
	112	};
	113
	114	struct ipv6_comp_hdr {
	115	__u8 nexthdr;
	116	__u8 flags;
	117	__be16 cpi;
	118	};
	119
	120	/*
	121	* IPv6 fixed header
	122	*
	123	* BEWARE, it is incorrect. The first 4 bits of flow_lbl
	124	* are glued to priority now, forming "class".
	125	*/
	126
	127	struct ipv6hdr {
	128	#if defined(__LITTLE_ENDIAN_BITFIELD)
	129	__u8 priority:4,
	130	version:4;
	131	#elif defined(__BIG_ENDIAN_BITFIELD)
	132	__u8 version:4,
	133	priority:4;
	134	#else
	135	#error "Please fix <asm/byteorder.h>"
	136	#endif
	137	__u8 flow_lbl[3];
	138
	139	__be16 payload_len;
	140	__u8 nexthdr;
	141	__u8 hop_limit;
	142
	143	struct in6_addr saddr;
	144	struct in6_addr daddr;
	145	};
	146
	147	/*
	148	* This structure contains configuration options per IPv6 link.
	149	*/
	150	struct ipv6_devconf {
	151	__s32 forwarding;
	152	__s32 hop_limit;
	153	__s32 mtu6;
	154	__s32 accept_ra;
	155	__s32 accept_redirects;
	156	__s32 autoconf;
	157	__s32 dad_transmits;
	158	__s32 rtr_solicits;
	159	__s32 rtr_solicit_interval;
	160	__s32 rtr_solicit_delay;
	161	__s32 force_mld_version;
	162	#ifdef CONFIG_IPV6_PRIVACY
	163	__s32 use_tempaddr;
	164	__s32 temp_valid_lft;
	165	__s32 temp_prefered_lft;
	166	__s32 regen_max_retry;
	167	__s32 max_desync_factor;
	168	#endif
	169	__s32 max_addresses;
	170	__s32 accept_ra_defrtr;
	171	__s32 accept_ra_pinfo;
	172	#ifdef CONFIG_IPV6_ROUTER_PREF
	173	__s32 accept_ra_rtr_pref;
	174	__s32 rtr_probe_interval;
	175	#ifdef CONFIG_IPV6_ROUTE_INFO
	176	__s32 accept_ra_rt_info_max_plen;
	177	#endif
	178	#endif
	179	__s32 proxy_ndp;
	180	void *sysctl;
	181	};
	182
	183	/* index values for the variables in ipv6_devconf */
	184	enum {
	185	DEVCONF_FORWARDING = 0,
	186	DEVCONF_HOPLIMIT,
	187	DEVCONF_MTU6,
	188	DEVCONF_ACCEPT_RA,
	189	DEVCONF_ACCEPT_REDIRECTS,
	190	DEVCONF_AUTOCONF,
	191	DEVCONF_DAD_TRANSMITS,
	192	DEVCONF_RTR_SOLICITS,
	193	DEVCONF_RTR_SOLICIT_INTERVAL,
	194	DEVCONF_RTR_SOLICIT_DELAY,
	195	DEVCONF_USE_TEMPADDR,
	196	DEVCONF_TEMP_VALID_LFT,
	197	DEVCONF_TEMP_PREFERED_LFT,
	198	DEVCONF_REGEN_MAX_RETRY,
	199	DEVCONF_MAX_DESYNC_FACTOR,
	200	DEVCONF_MAX_ADDRESSES,
	201	DEVCONF_FORCE_MLD_VERSION,
	202	DEVCONF_ACCEPT_RA_DEFRTR,
	203	DEVCONF_ACCEPT_RA_PINFO,
	204	DEVCONF_ACCEPT_RA_RTR_PREF,
	205	DEVCONF_RTR_PROBE_INTERVAL,
	206	DEVCONF_ACCEPT_RA_RT_INFO_MAX_PLEN,
	207	DEVCONF_PROXY_NDP,
	208	DEVCONF_MAX
	209	};
	210
	211	#ifdef __KERNEL__
	212	#include <linux/icmpv6.h>
	213	#include <linux/tcp.h>
	214	#include <linux/udp.h>
	215
	216	#include <net/if_inet6.h> /* struct ipv6_mc_socklist */
	217	#include <net/inet_sock.h>
	218
	219	/*
	220	This structure contains results of exthdrs parsing
	221	as offsets from skb->nh.
	222	*/
	223
	224	struct inet6_skb_parm {
	225	int iif;
	226	__u16 ra;
	227	__u16 hop;
	228	__u16 dst0;
	229	__u16 srcrt;
	230	__u16 dst1;
	231	__u16 lastopt;
	232	__u32 nhoff;
	233	__u16 flags;
	234	#ifdef CONFIG_IPV6_MIP6
	235	__u16 dsthao;
	236	#endif
	237
	238	#define IP6SKB_XFRM_TRANSFORMED 1
	239	};
	240
	241	#define IP6CB(skb) ((struct inet6_skb_parm*)((skb)->cb))
	242
	243	static inline int inet6_iif(const struct sk_buff *skb)
	244	{
	245	return IP6CB(skb)->iif;
	246	}
	247
	248	struct inet6_request_sock {
	249	struct in6_addr loc_addr;
	250	struct in6_addr rmt_addr;
	251	struct sk_buff *pktopts;
	252	int iif;
	253	};
	254
	255	struct tcp6_request_sock {
	256	struct tcp_request_sock tcp6rsk_tcp;
	257	struct inet6_request_sock tcp6rsk_inet6;
	258	};
	259
	260	/**
	261	* struct ipv6_pinfo - ipv6 private area
	262	*
	263	* In the struct sock hierarchy (tcp6_sock, upd6_sock, etc)
	264	* this _must_ be the last member, so that inet6_sk_generic
	265	* is able to calculate its offset from the base struct sock
	266	* by using the struct proto->slab_obj_size member. -acme
	267	*/
	268	struct ipv6_pinfo {
	269	struct in6_addr saddr;
	270	struct in6_addr rcv_saddr;
	271	struct in6_addr daddr;
	272	struct in6_addr *daddr_cache;
	273	#ifdef CONFIG_IPV6_SUBTREES
	274	struct in6_addr *saddr_cache;
	275	#endif
	276
	277	__u32 flow_label;
	278	__u32 frag_size;
	279	__s16 hop_limit;
	280	__s16 mcast_hops;
	281	int mcast_oif;
	282
	283	/* pktoption flags */
	284	union {
	285	struct {
	286	__u16 srcrt:2,
	287	osrcrt:2,
	288	rxinfo:1,
	289	rxoinfo:1,
	290	rxhlim:1,
	291	rxohlim:1,
	292	hopopts:1,
	293	ohopopts:1,
	294	dstopts:1,
	295	odstopts:1,
	296	rxflow:1,
	297	rxtclass:1;
	298	} bits;
	299	__u16 all;
	300	} rxopt;
	301
	302	/* sockopt flags */
	303	__u8 mc_loop:1,
	304	recverr:1,
	305	sndflow:1,
	306	pmtudisc:2,
	307	ipv6only:1;
	308	__u8 tclass;
	309
	310	__u32 dst_cookie;
	311
	312	struct ipv6_mc_socklist *ipv6_mc_list;
	313	struct ipv6_ac_socklist *ipv6_ac_list;
	314	struct ipv6_fl_socklist *ipv6_fl_list;
	315
	316	struct ipv6_txoptions *opt;
	317	struct sk_buff *pktoptions;
	318	struct {
	319	struct ipv6_txoptions *opt;
	320	struct rt6_info *rt;
	321	int hop_limit;
	322	int tclass;
	323	} cork;
	324	};
	325
	326	/* WARNING: don't change the layout of the members in {raw,udp,tcp}6_sock! */
	327	struct raw6_sock {
	328	/* inet_sock has to be the first member of raw6_sock */
	329	struct inet_sock inet;
	330	__u32 checksum; /* perform checksum */
	331	__u32 offset; /* checksum offset */
	332	struct icmp6_filter filter;
	333	/* ipv6_pinfo has to be the last member of raw6_sock, see inet6_sk_generic */
	334	struct ipv6_pinfo inet6;
	335	};
	336
	337	struct udp6_sock {
	338	struct udp_sock udp;
	339	/* ipv6_pinfo has to be the last member of udp6_sock, see inet6_sk_generic */
	340	struct ipv6_pinfo inet6;
	341	};
	342
	343	struct tcp6_sock {
	344	struct tcp_sock tcp;
	345	/* ipv6_pinfo has to be the last member of tcp6_sock, see inet6_sk_generic */
	346	struct ipv6_pinfo inet6;
	347	};
	348
	349	extern int inet6_sk_rebuild_header(struct sock *sk);
	350
	351	#if defined(CONFIG_IPV6) \|\| defined(CONFIG_IPV6_MODULE)
	352	static inline struct ipv6_pinfo * inet6_sk(const struct sock *__sk)
	353	{
	354	return inet_sk(__sk)->pinet6;
	355	}
	356
	357	static inline struct inet6_request_sock *
	358	inet6_rsk(const struct request_sock *rsk)
	359	{
	360	return (struct inet6_request_sock )(((u8 )rsk) +
	361	inet_rsk(rsk)->inet6_rsk_offset);
	362	}
	363
	364	static inline u32 inet6_rsk_offset(struct request_sock *rsk)
	365	{
	366	return rsk->rsk_ops->obj_size - sizeof(struct inet6_request_sock);
	367	}
	368
	369	static inline struct request_sock inet6_reqsk_alloc(struct request_sock_ops ops)
	370	{
	371	struct request_sock *req = reqsk_alloc(ops);
	372
	373	if (req != NULL)
	374	inet_rsk(req)->inet6_rsk_offset = inet6_rsk_offset(req);
	375
	376	return req;
	377	}
	378
	379	static inline struct raw6_sock raw6_sk(const struct sock sk)
	380	{
	381	return (struct raw6_sock *)sk;
	382	}
	383
	384	static inline void inet_sk_copy_descendant(struct sock *sk_to,
	385	const struct sock *sk_from)
	386	{
	387	int ancestor_size = sizeof(struct inet_sock);
	388
	389	if (sk_from->sk_family == PF_INET6)
	390	ancestor_size += sizeof(struct ipv6_pinfo);
	391
	392	__inet_sk_copy_descendant(sk_to, sk_from, ancestor_size);
	393	}
	394
	395	#define __ipv6_only_sock(sk) (inet6_sk(sk)->ipv6only)
	396	#define ipv6_only_sock(sk) ((sk)->sk_family == PF_INET6 && __ipv6_only_sock(sk))
	397
	398	struct inet6_timewait_sock {
	399	struct in6_addr tw_v6_daddr;
	400	struct in6_addr tw_v6_rcv_saddr;
	401	};
	402
	403	struct tcp6_timewait_sock {
	404	struct tcp_timewait_sock tcp6tw_tcp;
	405	struct inet6_timewait_sock tcp6tw_inet6;
	406	};
	407
	408	static inline u16 inet6_tw_offset(const struct proto *prot)
	409	{
	410	return prot->twsk_prot->twsk_obj_size -
	411	sizeof(struct inet6_timewait_sock);
	412	}
	413
	414	static inline struct inet6_timewait_sock inet6_twsk(const struct sock sk)
	415	{
	416	return (struct inet6_timewait_sock )(((u8 )sk) +
	417	inet_twsk(sk)->tw_ipv6_offset);
	418	}
	419
	420	static inline struct in6_addr __inet6_rcv_saddr(const struct sock sk)
	421	{
	422	return likely(sk->sk_state != TCP_TIME_WAIT) ?
	423	&inet6_sk(sk)->rcv_saddr : &inet6_twsk(sk)->tw_v6_rcv_saddr;
	424	}
	425
	426	static inline struct in6_addr inet6_rcv_saddr(const struct sock sk)
	427	{
	428	return sk->sk_family == AF_INET6 ? __inet6_rcv_saddr(sk) : NULL;
	429	}
	430
	431	static inline int inet_v6_ipv6only(const struct sock *sk)
	432	{
	433	return likely(sk->sk_state != TCP_TIME_WAIT) ?
	434	ipv6_only_sock(sk) : inet_twsk(sk)->tw_ipv6only;
	435	}
	436	#else
	437	#define __ipv6_only_sock(sk) 0
	438	#define ipv6_only_sock(sk) 0
	439
	440	static inline struct ipv6_pinfo * inet6_sk(const struct sock *__sk)
	441	{
	442	return NULL;
	443	}
	444
	445	static inline struct inet6_request_sock *
	446	inet6_rsk(const struct request_sock *rsk)
	447	{
	448	return NULL;
	449	}
	450
	451	static inline struct raw6_sock raw6_sk(const struct sock sk)
	452	{
	453	return NULL;
	454	}
	455
	456	#define __inet6_rcv_saddr(__sk) NULL
	457	#define inet6_rcv_saddr(__sk) NULL
	458	#define tcp_twsk_ipv6only(__sk) 0
	459	#define inet_v6_ipv6only(__sk) 0
	460	#endif /* defined(CONFIG_IPV6) \|\| defined(CONFIG_IPV6_MODULE) */
	461
	462	#define INET6_MATCH(__sk, __hash, __saddr, __daddr, __ports, __dif)\
	463	(((__sk)->sk_hash == (__hash)) && \
	464	((((__portpair )&(inet_sk(__sk)->dport))) == (__ports)) && \
	465	((__sk)->sk_family == AF_INET6) && \
	466	ipv6_addr_equal(&inet6_sk(__sk)->daddr, (__saddr)) && \
	467	ipv6_addr_equal(&inet6_sk(__sk)->rcv_saddr, (__daddr)) && \
	468	(!((__sk)->sk_bound_dev_if) \|\| ((__sk)->sk_bound_dev_if == (__dif))))
	469
	470	#endif /* __KERNEL__ */
	471
	472	#endif /* _IPV6_H */